Processing tool

Abstract

The present invention provides a processing tool that can attach and detach a tool chuck with a simple structure and can slide the tool axially relative to the shank. A deburring tool includes: a main body (13) having a cylinder chamber (15) with a tool chuck holding hole (18) and an anti-rotation body holding hole (17); a tool chuck (16) having an anti-rotation groove (25), disposed in the cylinder chamber (15) and reciprocating in the cylinder chamber (15); a first elastic body (21) disposed in the cylinder chamber (15) and applying a force to the tool chuck (16) in the front end direction; a cover (31) disposed outside the main body (13), capable of reciprocating along the central axis of the main body between a loading / unloading position (27) and a machining position (29), having a pressing surface (33) covering the anti-rotation body holding hole (17) and a relief portion (35) at the machining position (29); and an anti-rotation body (37) that is received in the relief portion (35) when the cover (31) is at the loading / unloading position (27) and the tool chuck (16) is pulled out from the tool chuck holding hole (18).

Description

Technical Field

[0001] The present invention relates to a processing tool. Background Art

[0002] Conventionally, a deburring tool that can adjust the pressing force of a tool against a workpiece has been proposed (for example, Japanese Patent No. 6025580). The conventional deburring tool includes: a rod that is inserted into a handle so as to be axially movable; a tool guide unit that guides a tool holding unit relative to the rod so as to be axially movable and integrally rotates in the rotational direction; a spring member that biases the tool holding unit relative to the rod in the direction of pressing the workpiece; and an initial length adjustment unit that adjusts the initial length of the spring member to adjust the pressing force based on the spring member. Summary of the Invention

[0003] An object of the present invention is to provide a processing tool that can attach and detach a tool chuck with a simple structure and can slide the tool axially relative to the main body.

[0004] One aspect of the present invention is

[0005] A processing tool including:

[0006] A main body that extends along a main body central axis and has:

[0007] A cylinder chamber that is disposed inside the main body and extends along the main body central axis and has a tool chuck holding hole that is open in the front end direction; and

[0008] A rotation prevention body holding hole that penetrates the main body in the radial direction;

[0009] A tool chuck that has a rotation prevention groove formed on the outer periphery of the tool chuck, is disposed inside the cylinder chamber, and reciprocates in the cylinder chamber;

[0010] A first elastic body that is disposed inside the cylinder chamber and biases the tool chuck in the front end direction;

[0011] A cover that is disposed outside the main body and can reciprocate along the main body central axis between a loading / unloading position and a processing position, and the cover has:

[0012] A pressing surface that covers the rotation prevention body holding hole at the processing position; and

[0013] An avoidance portion that is recessed radially outward from the inside of the cover; and

[0014] A rotation prevention body is supported in the rotation prevention body holding hole, moves between the rotation prevention groove and the pressing surface, and when the cover is in the loading and unloading position and the tool chuck is pulled out from the tool chuck holding hole, the rotation prevention body is received in the avoidance portion.

[0015] The processing tool is, for example, a deburring tool, a drilling tool, a thread cutting tool, or a brush. The deburring tool is installed on a processing machine to remove burrs attached to a workpiece. The processing machine is, for example, a robot equipped with a tool spindle, a lathe, a machining center, or a turning center. The shank of the deburring tool is installed on the tool spindle or the tailstock, and the entire deburring tool rotates together with the tool spindle.

[0016] For the sake of convenience in explanation, the side where the cutting tool or the brush is installed is referred to as the front end side, and the side where the shank is arranged is referred to as the base end side.

[0017] The main body, the push rod, the tool chuck, and the tool are arranged on the central axis of the shank, i.e., the shank axis. The rotation prevention body is held in the rotation prevention body holding hole. The rotation prevention body transmits the rotational torque applied to the main body to the tool chuck via the rotation prevention groove.

[0018] By the restoring force of the first elastic body, the push rod and the tool chuck are urged in the front end direction.

[0019] One or more rotation prevention grooves are formed on the tool chuck. The rotation prevention grooves are formed on the outer peripheral surface of the tool chuck. The rotation prevention grooves are formed parallel to the shank axis or in a spiral shape. The shape of the rotation prevention grooves can be appropriately selected so that the rotation prevention body can slide. A plurality of rotation prevention grooves are arranged in rotational symmetry. Preferably, a plurality of rotation prevention grooves are formed on the tool chuck.

[0020] The main body has the same number of rotation prevention body holding holes as the rotation prevention body. The rotation prevention body holding holes penetrate the main body.

[0021] The rotation prevention body holding hole has a rotation prevention body holding surface. The shape of the rotation prevention body holding surface is a conical surface or a cylindrical surface that tapers toward the inner peripheral side. Preferably, the rotation prevention body holding surface is a cylindrical surface. The rotation prevention body holding surface is inclined from the radial direction along the rotation direction of the tool.

[0022] It may also have a cover that covers the outer peripheral surface of the main body. The cover reciprocates along the main body central axis between the loading and unloading position of the tool chuck and the machining position for holding the tool chuck. The cover can be provided on either the base end side or the front end side. Preferably, the cover is provided on the base end side.

[0023] The rotation prevention body holding hole has a rotation prevention body anti - detachment portion at the inner peripheral side opening of the rotation prevention body holding surface. Preferably, the rotation prevention body anti - detachment portion has a curved surface along the rotation prevention body. The rotation prevention body anti - detachment portion can be formed integrally with the rotation prevention body holding surface. When the tool chuck is disassembled from the main body, the rotation prevention body anti - detachment portion prevents the rotation prevention body from falling off toward the inside of the main body of the rotation prevention body.

[0024] The rotation prevention body moves on the rotation prevention body holding surface, the pressing surface on the inner periphery of the cover, and in the rotation prevention groove. Preferably, when the cover is in the processing position, 20 to 45% of the diameter of the rotation prevention body protrudes from the main body.

[0025] The rotation prevention body is preferably a ball or a pin member. The rotation prevention grooves are arranged in the same number as the rotation prevention bodies or in a natural multiple of the number of rotation prevention bodies. When the rotation prevention body is a pin member, the end face on the tool chuck side can be set as a spherical surface, and the end face on the cover side can be set as a spherical surface or a flat surface.

[0026] The tool chuck slides along the rotation prevention groove.

[0027] The tool is, for example, a deburring tool, a drill bit for drilling, a tap for thread cutting, or a brush. The shape of the tool is appropriately selected according to the shape of the workpiece to be processed.

[0028] The avoidance portion is a space provided in the cover for moving the rotation prevention body to the outer peripheral side of the main body to separate the rotation prevention body from the rotation prevention groove of the tool chuck. The avoidance portion can be arranged on the inner peripheral surface of the cover. The avoidance portion is, for example, a circumferential groove or a spherical surface. The circumferential groove can also open toward the end face and have an enlarged diameter.

[0029] The processing tool can also have a stopper.

[0030] When the tool chuck is installed on the main body, the tool chuck is pushed into the main body so that the rotation prevention body is held in the rotation prevention groove.

[0031] When the tool chuck is loaded and unloaded from the main body, by sliding the cover, the rotation prevention body is moved to the avoidance portion. Thus, the holding of the tool chuck by the rotation prevention body is released. Then, the tool chuck is removed from the piston.

[0032] According to the processing tool of the present invention, the tool chuck can be loaded and unloaded with a simple structure, and the tool can be slid relative to the main body in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a longitudinal sectional view during processing of the deburring tool of Embodiment 1.

[0034] Figure 2 is a longitudinal sectional view during loading and unloading of a modification of Embodiment 1.

[0035] Figure 3A is Figure 1 a sectional view taken along line IIIA-IIIA of Figure 3B is Figure 3A a partially enlarged view of IIIB of

[0036] Figure 4A is a perspective view of the tool chuck of Embodiment 1, Figure 4B is a perspective view of the tool chuck of the modification.

[0037] Figure 5 It is a longitudinal sectional view during the loading and unloading of the deburring tool of Embodiment 1.

[0038] Figures 6A to 6D It is Figure 3B a modified example.

[0039] Figure 7 It is a modified example of the anti-rotation body.

[0040] Figure 8 It is a longitudinal sectional view of the deburring tool of Embodiment 2.

[0041] Figure 9 It is a longitudinal sectional view of the deburring tool of Embodiment 2.

[0042] Figure 10 It is Figure 9 the X-X sectional view.

[0043] Symbol Explanation

[0044] 10, 100 Deburring tool

[0045] 11 Handle

[0046] 12 Handle shaft

[0047] 13, 113 Main body

[0048] 14 External thread part

[0049] 15 Cylinder chamber

[0050] 16 Tool chuck

[0051] 17 Anti-rotation body holding hole

[0052] 18 Tool chuck holding hole

[0053] 19, 119 Push rod

[0054] 21 First elastic body

[0055] 22 Internal thread part

[0056] 23 Tool

[0057] 24 Spring holding hole

[0058] 25 Anti-rotation groove

[0059] 26 Outer cylinder surface

[0060] 27, 127 Loading and unloading position

[0061] 28 Tool holding hole

[0062] 29, 129 Processing position

[0063] 31, 131 Cover

[0064] 33 Pressing surface

[0065] 35 Avoidance part

[0066] 37 Anti-rotation body

[0067] 39 Anti-rotation body holding surface

[0068] 147 Stopper

[0069] 148 Second elastic body

[0070] 149 Long hole

[0071] 151 Pin component Detailed implementation manners

[0072] (Embodiment 1)

[0073] The processing tool 10 of the present invention is, for example, a deburring tool, a drilling tool, a thread cutting tool, or a brush. Hereinafter, in the present embodiment, a deburring tool 10 as an example of the processing tool 10 will be described. As Figure 1 shown, the deburring tool 10 of the present embodiment has a handle 11, a main body 13, a tool chuck 16, an anti-rotation body (ball) 37, and a cover 31. Herein, Figure 1 the right half part shows the state where the tool chuck 16 slides toward the handle 11.

[0074] The handle 11 extends along the handle axis 12. The main body 13 is connected to the handle 11. The main body 13 has a cylindrical shape and has a cylinder chamber 15 inside. A first elastic body 21 (compression coil spring) and a push rod 19 are arranged in the cylinder chamber 15.

[0075] The main body 13 extends along the main body central axis. The main body central axis coincides with the handle axis 12. The main body 13 has a cylinder chamber 15, a tool chuck holding hole 18, and two anti-rotation body holding holes (ball holding holes) 17. The main body 13 may also have an external thread portion 14. The external thread portion 14 is arranged on the proximal end side of the main body 13. The main body 13 is a hollow cylindrical shape. The cylinder chamber 15 is the internal cavity of the main body 13. The cylinder chamber 15 extends along the handle axis 12. Preferably, the cylinder chamber 15 is cylindrical. The cylinder chamber 15 has a tool chuck holding hole 18 at the front end. The tool chuck holding hole 18 extends along the handle axis 12.

[0076] In addition, the inner diameter of the tool chuck holding hole 18 may be the same as or smaller than the inner diameter of the cylinder chamber 15. Figure 2A modified example is shown where the inner diameter 36 of the tool chuck holding hole 18 is made smaller than the inner diameter 38 of the cylinder chamber 15. In this modified example, a stepped portion 45 is formed in the cylinder chamber 15. Figure 2 The right half shows the state where the tool chuck 16 is removed. As Figure 2 shown in the right half of, when removing the tool chuck 16, the stepped portion 45 prevents the push rod 19 pushed out by the first elastic body 21 from falling off.

[0077] Return Figure 1 , the anti-rotation body holding hole 17 can also penetrate the main body 13 radially from the outer peripheral surface of the main body 13 to the tool chuck holding hole 18. Each anti-rotation body holding hole 17 has an anti-rotation body holding surface 39 that holds one anti-rotation body 37.

[0078] The cylinder chamber 15 may have a spring holding hole 24 at the central portion of its base end surface (bottom surface). The push rod 19 may have a spring holding hole 24 at the central portion of its upper surface. Each spring holding hole 24 holds the first elastic body 21.

[0079] The tool chuck 16 has an outer cylindrical surface 26, two anti-rotation grooves 25, and a tool holding hole 28. The tool chuck 16 holds the tool 23. The tool chuck 16 is cylindrical. The outer cylindrical portion 26 slides relative to the tool chuck holding hole 18 in the direction of the shank 12.

[0080] Preferably, the tool chuck 16 has a plurality of (two in this embodiment) anti-rotation grooves 25. The plurality of anti-rotation grooves 25 are arranged rotationally symmetrically with respect to the shank 12. The anti-rotation grooves 25 extend parallel to the shank 12 on the inner peripheral surface of the cylinder chamber 15. The length of the anti-rotation groove 25 in the direction of the shank 12 is set to an arbitrary length according to the burrs to be removed or the size of the workpiece. The length of the anti-rotation groove 25 is preferably 1 to 5 times, more preferably 1.2 to 3.5 times, the tip length 32 of the tool 23. As Figure 3A , Figure 3B shown, the cross-sectional shape of the anti-rotation groove 25 is U-shaped. The anti-rotation groove 25 is formed along the outer periphery of the anti-rotation body 37. The width of the anti-rotation groove 25 is smaller than the diameter of the anti-rotation body 37.

[0081] In addition, as Figure 4A shown, the anti-rotation groove 25 is not limited to a shape extending parallel to the shank 12. The anti-rotation body 37 can be of any shape as long as it can reciprocate and can transmit the rotational torque from the shank 11 to the tool chuck 16 via the anti-rotation body 37 and the anti-rotation groove 25. For example, as Figure 4B shown, the anti-rotation groove 25 can also be a spiral (chord) shape that advances toward the base end side in the direction opposite to the rotation direction of the tool 23.

[0082] Return Figure 1, the tool holding hole 28 opens in the front end direction of the tool chuck 16 and is arranged along the shank axis 12. The tool 23 is inserted into and held in the tool holding hole 28. The tool 23 can be any tool selected according to the size, shape, etc. of the burr.

[0083] During machining, the push rod 19 reciprocates freely in the cylinder chamber 15 by the balance of the thrust acting on the tool chuck 16 from the workpiece and the restoring force of the first elastic body 21. When the tool chuck 16 is removed, the push rod 19 is pushed out by the first elastic body 21 and moves toward the front end of the tool chuck 16.

[0084] The anti-rotation body 37 is a ball, for example. As Figure 3A , Figure 3B shown, each anti-rotation body 37 is held by the anti-rotation body holding surface 39 and the pressing surface 33 of the anti-rotation body holding hole 17. By the anti-rotation body 37, the anti-rotation groove 25 moves, and the tool chuck 16 reciprocates in the cylinder chamber 15. The range in which the anti-rotation groove 25 can be moved by the anti-rotation body 37 determines the reciprocating end of the push rod 19.

[0085] As Figure 3B shown, the anti-rotation body holding surface 39 is inclined with respect to the radial direction toward the rotation direction A of the tool 23. The anti-rotation body holding surface 39 is a cylindrical surface. An anti-rotation body anti-disengagement portion 41 is provided at the front end portion (inner side in the radial direction) on the tool chuck 16 side of the anti-rotation body holding surface 39. The anti-rotation body anti-disengagement portion 41 is located on the opposite side of the rotation direction and has a holding spherical surface 43. For example, about 40% of the diameter of the anti-rotation body 37 protrudes from the main body 13. The anti-rotation body 37 transmits the rotational torque of the shank 11 to the tool chuck 16 via the anti-rotation groove 25 by being pressed by the pressing surface 33 and the anti-rotation body holding surface 39 (cylindrical surface) of the anti-rotation body holding hole 17.

[0086] The cover 31 has a pressing surface 33, an avoidance portion 35, and an internal thread portion 22. The cover 31 has the internal thread portion 22 on the inner peripheral surface. The cover 31 is integrally formed in a hollow cylindrical shape. The cover 31 covers the outer peripheral surface of the main body 13. The internal thread portion 22 is arranged at the base end portion of the inner peripheral surface of the cover 31. The internal thread portion 22 engages with the external thread portion 14. The avoidance portion 35 is arranged at the front end portion of the inner peripheral surface of the cover 31. The avoidance portion 35 is, for example, a circumferential groove.

[0087] Figure 5The right half shows the state where the tool chuck 16 is detached from the main body 13. The cover 31 can move between the machining position 29 and the loading / unloading position 27. At the machining position 29, the pressing surface 33 of the cover 31 covers the anti-rotation body 37 and the anti-rotation body holding hole 17. Since the anti-rotation body 37 is inhibited by the pressing surface 33, the anti-rotation body 37 is held in the anti-rotation groove 25. When the cover 31 moves to the loading / unloading position 27, in the direction of the shank 12, the position of the avoidance portion 35 coincides with the position of the anti-rotation body holding hole 17. At this time, the anti-rotation body 37 is received in the avoidance portion 35 and can move radially outward of the tool chuck holding hole 18.

[0088] At the machining position 29, the tool chuck 16 abuts against the push rod 19. At the machining position 29, the push rod 19 and the tool chuck 16 are pressed by the first elastic body 21.

[0089] When the cover 31 is moved to the loading / unloading position 27, the avoidance portion 35 moves to the position of the anti-rotation body holding hole 17. The tool chuck 16 is pressed by the first elastic body 21 via the push rod 19. And, the proximal end side of the anti-rotation groove 25 of the tool chuck 16 pushes the anti-rotation body 37 toward the distal end side. Thus, the anti-rotation body 37 moves toward the avoidance portion 35, and the connection between the anti-rotation body 37 and the tool chuck 16 is released. By further pressing the push rod 19 by the first elastic body 21, the tool chuck 16 is pushed toward the distal end side. In this way, the tool chuck 16 is detached.

[0090] When installing the tool chuck 16, the cover 31 is moved to the loading / unloading position 27, and the tool chuck 16 is inserted into the tool chuck holding hole 18. Then, when the anti-rotation groove 25 reaches the position of the anti-rotation body holding hole 17, the cover 31 is moved to the machining position 29. Then, the anti-rotation body 37 moves radially inward so that the anti-rotation body 37 contacts the anti-rotation body holding hole 17 and the anti-rotation groove 25 from the avoidance portion 35. Then, the tool chuck 16 is connected to the anti-rotation body 37.

[0091] The anti-rotation body holding surface 39 of the anti-rotation body holding hole 17 is inclined with respect to the radial direction in the rotation direction of the tool 23, whereby the anti-rotation body 37 can be pressed toward the center of the tool chuck 16. And, the rotational torque of the shank 11 can be transmitted to the anti-rotation groove 25 more reliably and effectively.

[0092] In addition, as shown in FIG. 6, the shape of the anti-rotation body holding surface 39 is not limited to a cylindrical surface. As long as the torque can be transmitted to the anti-rotation groove 25 and the anti-rotation body 37 does not fall off when the tool chuck 16 is detached, the anti-rotation body holding surface 39 can be any shape. For example, as Figure 6A 、 Figure 6B shown, the anti-rotation body holding surface 39 may also have a surface partially parallel to the radial direction. As Figure 6C shown, the anti-rotation body holding surface 39 may also have a conical surface that tapers in the direction of the shank 12. In addition, as Figure 6DAs shown, the rotation prevention body holding surface 39 can also be inclined in a direction opposite to the rotation direction of the tool 23.

[0093] The rotation prevention body 37 is not limited to a spherical shape. As long as it can move in the rotation prevention groove 25 and can move to the avoidance portion 35 during torque transmission to the rotation prevention groove 25 and removal of the tool chuck 16, the rotation prevention body 37 can be of any shape. For example, as Figure 7 shown, the rotation prevention body can also be a pin 42. The end face on the tool chuck 16 side of the pin 42 is a hemispherical surface. The end face of the pin 42 that contacts the pressing surface 33 is in the shape of an arc. The pin 42 is arranged along the inclination of the rotation prevention body holding surface 39. When removing the tool chuck 16 from the main body 13, the pin 42 moves along the rotation prevention body holding surface 39 to the avoidance portion 35.

[0094] (Embodiment 2)

[0095] Hereinafter, in the present embodiment, a deburring tool 100 as an example of the processing tool 10 will be described. As Figure 8 shown, the deburring tool 100 of the present embodiment has a main body 113, a push rod 119, a cover 131, an elastic body chamber 146, a second elastic body 148 (compression coil spring), and a stopper 147. The elastic body chamber 146 is provided between the main body 113 and the cover 131. Figure 8 The right half part shows the state where the tool chuck 16 is removed from the main body 113.

[0096] Figure 9 is a longitudinal sectional view obtained by rotating the deburring tool 100 of the present embodiment by 90 degrees around the handle shaft 12 with respect to Figure 8 the handle shaft 12. Figure 10 is Figure 9 the X-X sectional view of Figure 9 , Figure 10 shown, the main body 113 has two long holes 149. Each long hole 149 extends parallel to the handle shaft 12. The long hole 149 can also be a through hole penetrating the main body 113. The long hole 149 can also be a groove formed on the inner surface of the main body 113.

[0097] In addition, when the rotation prevention groove 25 is in a spiral shape, the long hole 149 can also be set to the same spiral shape.

[0098] The push rod 119 has a pin member 151 penetrating in the radial direction. Both ends of the pin member 151 slide in the long hole 149. The pin member 151 is fixed to the push rod 119, for example. By restricting the reciprocating stroke of the pin member 151 by the axial length of the long hole 149, it is possible to prevent the push rod 119 from falling off the main body 113.

[0099] The cover 131 is integrally formed in a hollow cylindrical shape. The cover 131 covers the outer peripheral surface of the main body 113. The inner surface of the cover 131 slides on the outer peripheral surface of the main body 113. The compression coil spring 148 is accommodated in the elastic body chamber 146. The cover 131 is pressed in the distal end direction by the compression coil spring 148. The stopper 147 prevents the cover 131 from falling off.

[0100] The other structures of the deburring tool 100 of the present embodiment are the same as those of the deburring tool 10 of the first embodiment.

[0101] When the tool chuck 16 is detached from the deburring tool 100, the cover 131 is pushed toward the proximal end side from the machining position 129 and moved to the loading / unloading position 127. At the loading / unloading position 127, the cover 131 moves the avoidance portion 35 to the rotation prevention body holding hole 17 and the rotation prevention body 37. At this time, if the tool chuck 16 is pulled toward the distal end side, the rotation prevention body 37 is pushed out to the avoidance portion 35 by the rotation prevention groove 25. Thus, the holding of the tool chuck 16 by the rotation prevention body 37 is released, and the tool chuck 16 can be detached from the main body 113.

[0102] When the tool chuck 16 is installed, the cover is moved to the loading / unloading position 127, and the tool chuck 16 is inserted into the tool chuck holding hole 18. Then, when the rotation prevention groove 25 reaches the position of the rotation prevention body holding hole 17, the cover 131 is moved to the machining position 129. Then, the rotation prevention body 37 moves from the avoidance portion 35 to the rotation prevention body holding hole 17 and the rotation prevention groove 25, and the tool chuck 16 engages with the rotation prevention body 37.

[0103] The present invention is not limited to the foregoing embodiments, and various modifications can be made without departing from the gist of the present invention. All technical matters included in the technical idea described in the claims become the object of the present invention. The above embodiments show preferred examples, and those skilled in the art can implement various alternative examples, correction examples, modification examples, or improvement examples based on the content disclosed in this specification, and these are included within the technical scope described in the appended claims.

Claims

1. A processing tool (10, 100), characterized in that, Comprising: A main body (13, 113) that extends along a main body central axis and has: A cylinder chamber (15) that is disposed inside the main body (13, 113) and extends along the main body central axis, and has a tool chuck holding hole (18) that has an opening in the front end direction; And A rotation prevention body holding hole (17) that penetrates the main body (13, 113) in the radial direction; A tool chuck (16) that has a rotation prevention groove (25) formed on the outer periphery of the tool chuck (16), is disposed inside the cylinder chamber (15), and reciprocates in the cylinder chamber (15); A first elastic body (21) that is disposed inside the cylinder chamber (15) and applies a force to the tool chuck (16) in the front end direction; A cover (31, 131) that is disposed outside the main body (13, 113) and can reciprocate along the main body central axis between a loading / unloading position (27, 127) and a machining position (29, 129), and the cover (31, 131) has: A pressing surface (33) that covers the rotation prevention body holding hole (17) in the machining position (29, 129); and An avoidance portion (35) that is recessed radially outward from the inside of the cover (31, 131); And A rotation prevention body (37, 42) that is supported by the rotation prevention body holding hole (17), moves between the rotation prevention groove (25) and the pressing surface (33), and when the cover (31, 131) is at the loading / unloading position (27, 127) and the tool chuck (16) is pulled out from the tool chuck holding hole (18), the rotation prevention body (37, 42) is received in the avoidance portion (35), The main body (13, 113) has a rotation prevention body holding surface (39) that holds the rotation prevention body (37) in the rotation prevention body holding hole (17), and the rotation prevention body holding surface (39) is a cylindrical surface, The processing tool (10, 100) further has a rotation prevention body anti - detachment portion (41), and the rotation prevention body anti - detachment portion (41) is disposed on the rotation prevention body holding surface (39) to prevent the rotation prevention body (37, 42) from falling off, The rotation prevention body anti - detachment portion (41) has a holding spherical surface (43) along the rotation prevention body (37, 42), The rotation prevention body holding surface (39) is inclined toward the outer side in the radial direction of the main body (13, 113) and in the rotation direction of the processing tool (100) with respect to a line that passes through the center of the rotation prevention body (37, 42) and is orthogonal to the main body central axis, The rotation prevention body anti - detachment portion (41) has a first rotation prevention body anti - detachment portion located on the side opposite to the rotation direction of the processing tool (100) and a second rotation prevention body anti - detachment portion located on the rotation direction side of the processing tool (100), The first rotation prevention body anti - detachment portion is larger than the second rotation prevention body anti - detachment portion.

2. The processing tool (10, 100) according to claim 1, wherein In a state where the rotation prevention bodies (37, 42) are in contact with the pressing surface (33) and the rotation prevention groove (25) of the covers (31, 131), the centers of the rotation prevention bodies (37, 42) are located in the rotation prevention body holding holes (17).

3. The processing tool (10, 100) according to claim 1 or 2, characterized in that the rotation prevention bodies (37, 42) are balls.

4. The processing tool (10, 100) according to claim 1 or 2, characterized in that the rotation prevention groove (25) extends parallel to the central axis of the main body.

5. The processing tool (10, 100) according to claim 1 or 2, characterized in that the rotation prevention groove (25) has a spiral shape that advances toward the proximal end side in a direction opposite to the rotation direction of the deburring tool which is the processing tool (10, 100).

6. The processing tool (10, 100) according to claim 1 or 2, characterized in that, It further comprises: a push rod (19) that reciprocates within the cylinder chamber (15) and applies a force to the tool chuck (16) in the forward end direction.

7. The processing tool (100) according to claim 1 or 2, characterized in that, It further comprises: an elastomer chamber (146) that is disposed between the main body (113) and the cover (131); and a second elastomer (148) that is disposed in the elastomer chamber (146) and applies a force to the cover (131) from the loading / unloading position (127) toward the processing position (129).

8. The processing tool (10, 100) according to claim 1 or 2, characterized in that the tool chuck (16) is capable of loading and unloading tools.

9. The processing tool (10, 100) according to claim 1 or 2, characterized in that, It further comprises: a handle (11) that extends along the central axis of the main body and is connected to the main body (13, 113).

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